Apache Traffic Server up to 6.2.3/7.1.8/8.0.5 Chunked Encoding request smuggling

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Apache Traffic Server up to 6.2.3/7.1.8/8.0.5. It has been declared as critical. This vulnerability affects an unknown part of the component Chunked Encoding Handler. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and chunked encoding. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

The weakness was presented 03/23/2020. This vulnerability was named CVE-2019-17565 since 10/14/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 7.1.9 or 8.0.6 eliminates this vulnerability.

See VDB-152007 for similar entry.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍


Class: Request smuggling
CWE: CWE-444

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Traffic Server 7.1.9/8.0.6


10/14/2019 🔍
03/23/2020 +161 days 🔍
03/24/2020 +1 days 🔍
04/18/2024 +1486 days 🔍


Vendor: apache.org

Advisory: lists.apache.org
Status: Not defined

CVE: CVE-2019-17565 (🔍)
See also: 🔍


Created: 03/24/2020 07:54 AM
Updated: 04/18/2024 08:40 PM
Changes: 03/24/2020 07:54 AM (38), 03/24/2020 07:59 AM (17), 04/18/2024 08:40 PM (18)
Complete: 🔍
Cache ID: 44:A23:40


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